| 年月 | 单位：% |
| 2009-05 | -0.24 |
| 2009-04 | -0.30 |
| 2009-03 | -33.46 |
| 2009-02 | -22.09 |
| 2009-01 | 15.11 |
| 2008-12 | -17.40 |
| 2008-11 | -19.00 |
| 2008-10 | -0.50 |
| 2008-09 | 2.90 |
| 2008-08 | -14.90 |
| 2008-07 | -0.60 |
| 2008-06 | 8.20 |
| 2008-05 | 19.50 |
| 2008-04 | 26.00 |
| 2008-03 | 28.70 |
| 2008-02 | 23.70 |
| 2008-01 | 17.43 |
| 2007-12 | 63.10 |
| 2007-11 | 43.00 |
| 2007-10 | 31.20 |
| 2007-09 | 27.60 |
| 2007-08 | 53.50 |
| 2007-07 | 53.10 |
| 2007-06 | 30.90 |
| 2007-05 | 40.80 |
| 2007-04 | 34.40 |
| 2007-03 | 28.70 |
| 2007-02 | 20.70 |
| 2007-01 | 64.29 |
| 2006-12 | 32.80 |
| 2006-11 | 70.90 |
| 2006-10 | 57.10 |
| 2006-09 | 37.40 |
| 2006-08 | 29.00 |
| 2006-07 | 27.80 |
| 2006-06 | 45.50 |
| 2006-05 | 65.70 |
| 2006-04 | 61.40 |
| 2006-03 | 64.70 |
| 2006-02 | 124.90 |
| 2005-12 | 53.20 |
| 2005-11 | 40.00 |
| 2005-10 | 71.70 |
| 2005-09 | 41.50 |
| 2005-08 | 23.80 |
| 2005-07 | 30.50 |
| 2005-06 | 3.70 |
| 2005-05 | -21.70 |
| 2005-04 | -11.00 |
| 2005-03 | -14.50 |
| 2005-02 | -24.10 |
| 2005-01 | -3.80 |
| 2004-12 | -22.10 |
| 2004-11 | -16.90 |
| 2004-10 | -26.20 |
| 2004-09 | -2.10 |
| 2004-08 | 25.20 |
| 2004-07 | 47.00 |
| 2004-06 | 40.20 |
| 2004-05 | 48.20 |
| 2004-04 | 75.20 |
| 2004-03 | 75.30 |
| 2004-02 | 73.40 |
| 2004-01 | 4.60 |
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